time and time again

i wonder if time is really a relative quatity
someone said that it is just something that a clock measures...
the concept of time that we hold so dear is it all just a mere illusion of our minds and over imaginative?
really...
all this while..
counting the seconds, minutes and hours...
all these are actually just something we count by using a clock?watch?
apparently,
we really are deluded..
or are we?
well i guess that depends solely on the person who is counting the seconds..
is it a really important part of life or just a quantity that a clock measures?